126565530 has 192 divisors, whose sum is σ = 392999040. Its totient is φ = 25837056.

The previous prime is 126565513. The next prime is 126565531. The reversal of 126565530 is 35565621.

It is a junction number, because it is equal to n+sod(n) for n = 126565491 and 126565500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126565531) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 706981 + ... + 707159.

It is an arithmetic number, because the mean of its divisors is an integer number (2046870).

Almost surely, 2^126565530 is an apocalyptic number.

126565530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 126565530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196499520).

126565530 is an abundant number, since it is smaller than the sum of its proper divisors (266433510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126565530 is a wasteful number, since it uses less digits than its factorization.

126565530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 126565530 is about 11250.1346658607. The cubic root of 126565530 is about 502.0787192098.

Subtracting from 126565530 its reverse (35565621), we obtain a palindrome (90999909).

It can be divided in two parts, 1265 and 65530, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 126565530 in words is "one hundred twenty-six million, five hundred sixty-five thousand, five hundred thirty".